Fuel supply apparatus for internal-combustion engines



P 1950 M. J. BERLYN ETAL Re. 23,268

FUEL SUPPLY APPARATUS FOR INTERNAL-COMBUSTION ENGINES Original FiledApril 5, 1946 4 Sheets-Sheet 1 INVENTORS. MARTIN J. BETZLYN JOHN J.BRODERICK ATTOE'NE Y.

Sept. 19, 1950 M. J. BERLYN ETAL 23,258

FUEL SUPPLY APPARATUS FOR INTERNAL-COMBUSTION ENGINES Original FiledApril 5, 1.94s

4 Sheets-Sheet 2 INVENTORS. MAE'TlN J. BERLYN Y JOHN J. BYODERICK BATTOPNEY.

Sgpt. 19, 1950 M. J. BERLYN ET AL Re. 23,268

FUEL SUPPLY APPARATUS FOR INTERNAL-COMBUSTION ENGINES Original FiledApril 5, 1946 4 Sheets-Sheet 5 IN V EN TORS MARTIN J. BEE LYN JOH N J.DRODEEICK Sept. 19, 1950 M. J. BERLYN ETAL FUEL SUPPLY APPARATUS FORINTERNAL-COMBUSTION ENGINES 4 Sheets-Sheet 4 Original Filed April 5,1946 INVENTORS. MARTIN J. BEE LYN BY JOHN J. DRODERICK A TOENE Y.

Reissued Sept. 19, 1950 FUEL SUPPLY APPARATUS FOR INTERNAL- COMBUSTIONENGINES Martin J. Berlyn, Suffleld, Conn., and John J.

Broderick, Springfield, Masa, American Bosch Corporation,

assignors to pringfi Mass a corporation of New York Original No.2,465,784, dated March 29, 1949, Se-

rial No. 659,708; April 5, 1946. Application for reissue June 9, 1950,Serial No. 167,166

24 Claims.

This invention relates to new and improved means for supplying fuel tothe cylinders of an internal combustion engine and has particularreference to the provision of such apparatus which is relatively small,compact and economical in construction yet efllcient in operation.

The principal object of the invention is to provide fuel supplyingapparatus for small, high speed Diesel engines, or the like, whichapparatus is relatively small, compact and economical in cost yetsatisfactory in operation and which will incorporate features which makepossible the utilizing of less costly drive and mounting means.

Another object of the invention is to provide a relatively small,compact and economical fuel supply unit which contains the fuel supplypump, injection pump and governor in a single unit and wherein theinjection pump head, supply pump or governor may be separately removedfor service or replacement without removing the unit from the engine.

Another object of the invention is to provide a fuel injection pumpwhich is designed to perate at crankshaft speed when used with fourstroke cycle engines, instead of operating at onehalf crankshaft speedas is usual with prior constructions, and thereby allows the use of apump driving pinion of one-half the usual pitch diameter andconsequently reduces the size of said pinion to a point where it may bewithdrawn through the pilot for the mounting flange for the pump to theengine drive gear housing and also allows the pump pinion to be mounteddirectly on the pump shaft and in many installations this amounts to theelimination of two bearings, a seal and a coupling.

Another object of the invention is to provide a fuel injecton pump whichemploys a pump drive pinion of relatively small diameter andthereforeallows a reduction in the size of the latterally protrudingpump drive gear housing and allows the making of the whole enginenarrower than previously possible and which feature is especiallydesirable for engines for agricultural tractors.

g Matter enclosed in heavy brackets II appears in the original patentbut forms no part a! this reissue specification; matter printed initalics indicates the additions made by reissue Another object of theinvention is to provide I a new and improved fuel injection. pumpwherein the number of components requiring exceedingly fine workmanshipsuch as lapped fits, accurately calibrated discharge check valves andground metering edges have been reduced to a minimum. j I

Another object of 'the invention is to provide a fuel injection pumpwhich avoids features una fuel injection pump which is designed to havenatural inherent stable delivery characteristics, that is, the tendencyto deliver a lower volume of fuel per stroke as the speed of operationincreased.

Another object of the invention is to pmvide a fuel injection pump whichassists the operation of the governor therefor instead of opposing theaction of the governor as in usual constructions and thereby makespossible the obtaining of satisfactory results with a relatively simpleand economical governor.

Another object of the invention is to provide :a device of the charactefdescribed wherein it is practicable to mount' the governor directly onthe 'pump drive shaft thus eliminating the necessity for speedincreasing gearing which is both expensive and bulky.

Another object of the invention is to provide an arrangement of the typeset forth wherein :it is possible to driveth'e fuel supply pump from thedistributor gear of the fuel injection pump and earpump outlets to thespray nozzles. Inthis connection itis well known .that single plungerpumps using distributing means to direct successive pump discharges tovarious spray nozzles, not provided with discharge check valve means.are inherently instable and do not given tolerable degree of accuracy ofdistribution as between the various outlets and the introduction ofdelivery check valves in each of the outlets is one way of improving theaccuracy of distribution, but the discharge check valves themselves havesuch a marked influence on the delivery characteristics that minutedifferences in the dimensions of the various check valves used in thedelivery char acteristics of the various outlets and, therefore, animportant object of the present invention is the pump can im-,

cases as the utilisation of a single discharge check valve serving allof the pump outlets and with said dis charge check valve located betweenthe pumping element and the distributing element.

- a new and improved fuel injection pump which will not pump fuel ifoperated in a reverse direction, thereby overcoming a drawback and causeof difficulty with prior constructions Other objects and advantages ofthe invention will be apparent from the following description taken inconnection with the accompanying drawings. It will be understood thatmany changes may be made in the details of construchon and arrangementof parts shown and described, as the preferred form has been shown,Referring to the drawings:'

Fig. 1 is a top or plan view of a device embodyl'lg. 3 looking in thedirection of the arrows;

Fig. 5is'a sectional viewtakenonline H ofFig.1lookinginthedirectionofthearrows;

Fig. 6 is a fragmentary sectional view taken onlineHofFig.1lookinginthedirectionofthe arrows; and

Pig. 7 is a fragmentary sectional view, on an scale, of the dischargevalve.-

the purpose of illustrating the invention only, it has been shownapplied to aunit adapted supply fuel toa four cylinder engine operatingon a four stroke cycle, but it is capable of being other than fourcylinders, for example, two or six cylinders.

Referring more particularly to the drawings,

prises the fuel supply pu'mp I, the' fuel injection pump 2 and thegovernor 3 secured together to form a single relatively small compactunit which maybemountedonorremovedfromanengine as a single lmit. f

Thefuelsupplypump i hasbeenshownbyway of illustration as a conventionalgear type pump including the gears la and lb and the flow from thesupply pump is controlled by the throttleleverlandthesegmentionthethrottleshaft 8. While, as stated above. aconventional gear type pumphasbeenshownbywayof illustration,itwillbeunderstoodthatother prior arttypesof fuel supply pumps capableof being mounted into a compact unit with the fuel injection pump 2 andthe governor 3 may be employed, or, if desired. the fuel supply pump maybe formed as a separate member having a fuel supply line connected tothe fuel injection pump for supplying fuel thereto. The fuel supply pumpl is adapted to receive fuel from the fuel supply tank through I a line,not shown, which connects the fuel supply tween the seat II and thetappet ill.

tank with fuel inlet 0: and fuel from the supply pump I through outlet.3 through a line, not shown, to the fuel inlet It for the fuelinjectlon pump, through which it p to the fuel inlet supply chamber N.

The fuel injection pump 2 is composed of the pump head I, main pumphousing 1b and gear housing la, which are secured in assembled relationby bolts or the like, or other suitable means. The pump is operated bythe camshaft 8 which is provided with the two oppositely disposed camlobes I which are rotatable upon rotation of the camshaft I and adaptedto reciprocate the plunger II, the said plunger making two completecycles for each rotation of the camshaft I.

The camshaft 8 is rotatably mounted adjacent its opposite ends on theball bearing II and the bearing Ila in the main pump housing lb, and isprovided with the hub drive I! adapted to be secured to the driving gearof the engine with which the device is employed by being bolted theretoby bolts extending through the openings II in said hub if. The mountingflange I4 is provided for securing the pump assembly in position on theengine.

On the camshaft I is provided the circular gear II which is rotated bysaid camshaft I and which meshes with the annular face gear it which hasthe hub lia which is rotatably mounted on the bearing II in thehomingIt. The hub lia of the said face gear I. has an internal spline engagingan external spline on the tappet I! and causing rotation of the tappetll upon rotation of the face gear I. and therebycausing rotation of theplunger ll.

Within the hub "a onthe face gear ii is positioned the tappet II whichis in splined relation with the inner face of said gear and within whichis positioned the upper spring seat 20 and the lower spring seat IIwhich retains the end of the plunger II in engagement with the tappet I!through the action of the concentric coil plunger return springs 22 and23 which have their opposite ends the spring seats 2i] and 2|.

The upper springseat II is merely a stop for the springs 22 and a whilethe lower sprin seat Ii engages both the tappet II and the end of theplunger II and retains the end of the plunger be- Sald lower spring seat2| is preferably provided with a selfaligning coupling to eliminate theside thrust of a the plunger ll.

The pump head 1 contains the bore 24 in which the plunger I. isreciprocably and rotatably mounted. The reciprocation and rotation ofthe plunger Ill causes the plunger to pump. meter, distribute and timethe fuel to the proper outlet. The plunger II is provided with theannular lubrication groove 25 adapted to receive lubricating oil throughthe oil supply opening I! when the groove 25 passes said opening it uponreciprocation of the plunger II and said plunger III is also providedwith the annular fuel receiving groove 11 and the distributing groove 28which is in communication therewith, and, therefore, is adapted toreceive fuel from said annular fuel receiving groove 21. v

Fuel is adapted to be supplied to the bore 24 through the filling portfl in which is positioned the adjustable throttle or restriction memberll adapted to be adjusted to control the quantity of fuel supplied tothe bore 24 as hereinafter de-- scribed.

In the pump head I at the upper end of the bore 24 is provided thedischarge or check valve The'check valve arrangement 3|, as shown inFig. 6, comprises the cylindrical member 33 positioned in the bore 24and having the flanged head 34 seated on the pump head I surroundingsaid bore 24, and the delivery valve member 35 having opposed flattenedsurfaces 34 only one of which is shown, and having the enlarged head 31which has a tapered seat 33 adapted to engage an annular tapered seat inthe flanged head 34 of the cylindrical member 33 to normally prevent theflow of fuel through the discharge valve. It will be noted that thecylindrical member 33 might be omitted in which case the head 3| wouldseat directly on the pump head I. The flattened opposed surfaces 36 onthe opposite sides of the member 35 are preferably so formed as tocontrol the time of the beginning of flow of fuel through the dischargevalve and also the rate of flow therethrough.

If desired, and for particular purposes, the surface of the member 35may be formed of other suitable contours than the flattened surfaces 36described, for example, such a surface might be formed with longitudinalflutes, straight or tapered.

Above the cylindrical member 33 is positioned a speed-delivery adjustingmember 33 which is threaded into the pump housing in alignment with thebore 24 and delivery valve member 35 for vertical adjustment forcontrolling the quantity of fuel to be delivered. The speed-delivery,

adjusting member 39 has a central bore 40 in aligned relation with theenlarged head 31 on the member 35 and within said central bore 40 ispositioned a coil spring 4! adapted to rest at one end against the inneredge of the bore 40 in the member 39 and to have its opposite endengaging said enlarged head 31. This spring 4i is provided for effectingreturn of the head 31 of the valve member against its seat when thefluid flow pressure drops and also returns the member 34 against itsseat on the head 1. Over the adjusting member 39 is provided thethreaded plug 42 for closing the opening in the housing and which may beremoved for adjusting the member 39. The lower end of the adjustingmember 33 is provided with slots or openings 43 to allow fuel to passinto the supply groove 32 and from said supply groove the fuel passesthrough the port 32a ,connecting the fuel supply to the annular fuelreceiving groove 21 in the plunger III as previously described.

It is pointed out that with the form of delivery valve employed, asdescribed above, that as the speed at which the pump operates increases,the time for flow through the delivery valve decreases, and also that itis the tendency of the valve member 31 to be raised higher, that is, thevalve opens wider with higher operating speeds.

A very desirable feature of the present construction is its tendency toreduce delivery per stroke at high speeds, that is, it provides anatural decline in quantity of fuel delivered per stroke as the speed ofoperation of the engine per stroke increases, and since the engine getsa smaller charge of air per stroke at higher engine speeds,

8 the pump tends to maintain the ratio over the engine speed range.

In the pump housing I and surrounding the bore 24 and connected theretoare a series of out-' let ports 44, each of which is in communicationwith a separate distributing outlet 44a, each of which is connected by apipe line, not shown, to

correct air fuel a different cylinder of the engine to which fuel is tobe supplied. I

The outlet ports 44 are preferably in the same longitudinal plane,although this is not necessary, but radially spaced around the bore 24so that the distributing groove 23 on the plunger III will communicatewith one of said outlet ports during each stroke of the plunger and dueto the rotation of the plunger ll, said groove 28 will communicate witheach of said ports 44 successively during successive strokes of theplunger III.

The throttle or restriction member 33 in the ill] port or 'fuel inlet 23extends through the diaphragm member 53 which allows motion of thethrottle member 33 and also provides a seal for the fuel inlet supply59. The throttle member 33 extends through an opening in the diaphragm53 and is locked in position therewith by the locking nut 60 or othersuitable means.

The balancing or neutralizing spring ii is provided to partially balanceor offset the effect of the supply fuel pressure in the inlet supply 53against the diaphragm member 53.

Outlet 64a is the outlet for the overflow return 64b to the fuel supplytank and is adapted to be connected to the tank by a supply line.

The relief valve 65, which is connected to said return 64b between theoutlet 64a and the chamber 59, is provided for controlling the fuelsupply pressure.

The setting of the throttle or restriction member 30 is automaticallyaccomplished by the governor 3 as hereinafter described.

The governor 3 is secured to the fuel injection pump housing by means ofthe bolts 45 or other suitable means and the governor shaft 46 is keyedthe governor shaft and governor is driven simultaneously with and at thesame speed as the camshaft 8. On the governor shaft 45 and rotatabletherewith is the support 48 on which are mounted the pivotally mountedcentrifugal governor weights 41, each of which has a finger 43 adaptedto engage the adjustable collar 50 which is slidably mounted on thegovernor shaft 46, and said collar 50, in turn, abuts the forked end 5|on the pivoted lever 52 which has its opposite end operatively.connected by a resilient connection to the adjacent end of anotherpivoted lever 53 which has its opposite end connected tothe throttlemember 30 for controlling the supply of fuel to the bore 24.

A manually operated lever 4, exterior of the pump housing, is connectedto shaft 8 which is connected to the opposite ends of the coil spring 55which is also connected adjacent its center to the forked end 5| oflever 52 for controlling the amount of pressure upon the pivoted lever,52 and tension of the spring 55 and the shut off lever 54 on shaft 54aoperates the lug 56 on shaft 54a which is adapted to engage pin 56a onforked end 5| for pivoting of the forked end 5| of the pivoted lever 52for closing the supplyof fuel to the bore 24. I

With the construction described above, rotation of the governor shaft 46will cause pivotal movement of the centrifugal weights 4'! which willimpart axial movement of the collar member 53 1 7 g 8 against the forkedend ll of the pivoted lever fuel'to the various outlets 44 as describedabove. I! and thereby cause adjustment of pivoted lever With this typeof construction the pump could I! which will adjust the setting of thethrottle be adapted for manifold-type gasoline injection member SI andthereby automatically control the in e h y r q es 1 W Peak inlectionpres-. amount of fuel supplied tothe bore 24 of the sures having a valueof approximately one-tenth pump. By control of the tension on the springOfthflt mployed in Diesel engines of the general I, the settin of thegovernor may be effected. ype to which the fuel injection pump of thisap- The low idle adjustment, that is, the control of plication isdirected. Because of the low injection the throttle member 80 at lowspeeds is effected pressures. such construction would not be subjectthrough the leaf spring 88 which bears against 10 to the difllcultiespreviously set forth with inthe lower end of the pivoted lever 53. Theadlection pumps wherein the pumping plunger. has justing screwv ll,which may be reached for adan axial bore which is subject to highpressure. 1 justment by removal of the threaded plug a, om th r going,it will be seen that we have adjusts the tension of said leaf spring Ion said provided simple, em'cient and economical means lever 53 andthereby controls the position of the 1 for Obtaining all of the objectsand advantages of throttle 3. in conjunction with the governor I. hinvention. a

0n the pump housing is provided the pointer Having described ourinvention, we claim: II by means of which the pump is timed in the 1. Ina fuel injection pump, a combined pumpu i manner; After th mp is asembled, ing and distributing element to supply fuel to each the huh I:is rotated until the plunger II is in of a plurality of enginecylinders, means for reposition to close the inlet port and thedistributciprocating said element to pump f l and r a ing groove isaligned with number one outlet, and ing said element to distribute suchfuel, and a the hub is then marked in line with the pointer dischargecheck valve positioned in the fuel path 51; This allows the mounting ofthepump on between the pumping and distributing portions of the enginewith the pump in proper phased resaid element. lation with thecrankshaft. 2. In a fuel injection pump, a single combined In theoperation of the device the fuel supply 'llumplng be and distri member ppump receives fuel through the inlet II and suped o s pl ,fuel to aplurality of en i e cyl plies fuel to the fuel injection pump I throughders successively, means for reciprocating said the inlet 64 and inletsupply It to the ailing port so element to pump fuel a d r a a d element2! and then tothe bore 24. to distribute such' fuel, and a dischargecheck On the descending stroke of the plunger la, valve positioned inthe path of fuel flow between the delivery valve closes and the plungercreates the p g d d s ribu po tio s of s d a partial vacuum and uncoversthe inlet or filling memberport 1! which tends to fill the bore 2| dueto th 3. In a fuel injection pump, a bore, a combined pressure dropcreated inthe bore and the pressure P pin and i i g member i said bore,a

supply of fuel. plurality of outlets connected to said bore for Theamount of fuel'supplied to the bore 24 is supplying fuel to the variouscylinders of an incontrolled by means of the throttle member at ternaicombustion en ine su ssiv a fu l which, in turn, is controlled by thegovernor 3 as 40 path externally of said bore and connecting thepreviously described. On its pump g stroke, the Dumping and distributingportions of said memplunger ll closes the inlet port 2| and forces-theher, and a single discharge check valve between fuel in the bore 24through the discharge valve t pumpin p n of said m m r and said memberll. opening 32 and port 32a to the annuoutlets and adapted to'serve saidplurality of outlar fuel receiving groove 21 in the plunger from lets. 1which the fuel flows to the distributing groove II 4. In a fuelinjection pump having a bore, a which is aligned on successive pumpingstrokes pumping member in said bore and a plurality of. with each of theports 44 and supplies fuel to outlets connected to said bore and adaptedto each of said ports 44 and discharge outlets a connect said pumpingmember, with the various to the engine cylinders successively uponaligncylinders of an internal combustion engine to ment of saiddistributing groove with each of supply fuel thereto, a single meteringdevice and said outlets successively upon successive strokes a singledistributing means on said pumping of said plunger I0. member adapted toprovide precise equal distri- With the delivery valve as d c ib b v hvbution of fuel to each of said outlets successively ing the flattenedsurfaces on opposite id of and a fuel passageway externally of said borefor the stem, the valve controls both the time of the d liverin f l fromh p r ion f i bore in start of flow and the rate of flow, As pointed twhich it is pumped to said distributing means. above, as the speed ofthe pump increases, the In a fu l injection pump h vin a boretimeallowed for flow by the delivery valve shortpumping member in said boreand a plurality of ens and as it is the tendency of the valve to openoutlets connected to said bore and adapted to be higher or wider withhigher pump speeds, connected with the various cylinders of an in- Itwill be seen that because the same delivery ternal combustion engine tosupply fuel thereto, valve, distributing groove and metering means are asingle metering device and a single distributing employed in all casesthat the amount of fuel means on said pumping member adapted toprosupplied to each of the outlets is precisely the vide precise equaldistribution of fuel to each of same, thus overcoming one of the mostserious said outlets successively and a single discharge dimcultiespresent in prior art constructions as delivery valve, said valve beingpositioned in the Po e out a path of fuel flow between the pumping anddis- It is also pointed ,out that instead of the artributlng portions ofsaid pumping member. rangement shown with the external bore 32s., the 6.In a fuel injection pump, a bore, a single device could be constructedby forming a hollow combined pumping and distributing element in plungerhaving a single discharge delivery valve said bore, a plurality ofoutlets connected to said and with the plunger having a port adapted tobore adjacent said pumping element for supplyconnect the dischargedelivery valve and the fuel ing fuel to the various cylinders of aninternal distributing means which would distribute the combustionenginaasingle distributing meanson said pumping element adapted toregister with;

said outlets successively to deliver precisely equal fuel charges toeach outlet successively, and means externally of the bore forconnectingsaid distributing means to the supply of fuel pumped by saidpumping element.

7. In a fuel injection pump, a bore, a single pumping and distributingelement in said bore. means for reciprocating said element to pump fueland rotating said element to distribute such fuel, a plurality ofoutlets connected to said bore adjacent said pumping element, each ofsaid outlets'being adapted to be connected to a cylinder of an internalcombustion engine whereby fuel may be supplied to said cylinderssuccessively, a single distributing means on said pumping elementadapted to register with each of said outlets successively and a singledischarge valve in the path of fuel flow between the supply of fuelpumped by said pumping element and said distributing means.

8. In a fuel injection pump for internal combustion engines, a camshaftadapted to be rotated at engine crankshaft speed, a bore, a solidplunger in said bore and adapted to be reciprocated by said camshaft,said plunger having pumping and distributing portions, cam means on saidcamshaft for effecting a plurality of strokes of said plunger for eachrotation of said camshaft, and a single discharge check valve positionedin the path of fuel flow between the pumping and distributing portionsof said plunger.

9. In a fuel injection pump, a camshaft adapted to be rotated atcrankshaft speed, a bore, a single plunger in said bore and adapted tobe reciprocated by said camshaft, said' plunger having integral pumpingand distributing portions, cam means on said camshaft for effecting aplurality of strokes of said plunger for each rotation of said camshaft,a distributing member integral with said plunger and adapted to supplyfuel to a plurality of engine cylinders, a single metering deviceadapted to provide equal charges of fuel to each of the engine cylindersand a single discharge check valve positioned in the path of fuel flowbetween said pumping and said distributing portions of said plunger.

10. In a fuel injection pump, a bore, a solid pumping and distributingmember in said bore, a plurality of outlets therefrom, means forsupplying fuel to said pumping member, distributor means integral withsaid pumping member for distributing fuel to said outlets and port meansexterior of said bore for allowing the passage of fuel pumped by saidpumping member to said distributor means.

11. A fuel injection apparatus wherein a single pumping member isadapted to supply fuel to a plurality of combustion chamberssuccessively comprising a bore, a pumping and distributing member insaid bore, a plurality of outlets connected to said bore, fueldistributing means integral with said pumping member, a dischargedelivery valve communicating with said bore, a port external of saidbore-and connecting said discharge delivery valve and said fueldistributing means, a camshaft and means on said camshaft forsimultaneously causing reciprocation and rotation of said pumping memberto thereby effect pumping and distribution of fuel.

12. A fuel injection apparatus wherein a single pumping member isadapted to supply fuel to a plurality of combustion chamberssuccessively comprising, a bore, a pumping and distributing memberinsaid bore, a plurality of outlets connected to said bore, fueldistributing means integral with said pumping member, a dischargedelivery valve communicating with said bore, a port external of saidbore and adapted to connect said discharge delivery valve and said fueldistributing means, a camshaft, means on said camshaft forsimultaneously causing reciprocation and rotation of said pumping memberto thereby eifect pumping and distribution of fuel, and a single fuelsupply means for supplying fuel to said bore.

13. A fuel injection apparatus wherein a single pumping member isadapted to supply fuel to a plurality of combustion chamberssuccessively comprising, a bore, a pumping and distributing member insaid bore, a plurality of outlets connected to said bore, fueldistributing means integral with said pumping member, a discharge de-'livery valve communicating with said bore, a port external of said boreand adapted to connect said discharge delivery valve and said fueldistributing means, a camshaft, means on said camshaft forsimultaneously causing reciprocation and rotation of said pumping memberto thereby eflect pumping and distribution of fuel, a single fuel supplymeans for supplying fuel to said bore and an adjustable throttleassociated with said fuel supply means.

14. A fuel injection apparatus wherein a single a pumping member isadapted to supply fuel to a plurality of combustion chamberssuccessively comprising, a bore, a pumping and distributing member insaid bore, a plurality of outlets congral with said pumping member, adischarge delivery valve communicating with said bore, a port externalof said bore and connecting said discharge delivery valve and said fueldistributing means. a camshaft, means on said camshaft for simultaneouslcausing reciprocation and rotation of said pumping member to therebyeffect pumping and distribution of fuel, a single fuel supply means forsupplying fuel to said bore, an justable throttle associated with saidfuel supply means and a governor for automatically controlling saidthrottle.

15. In a fuel injection pump, a housing, a, bore in said housing, asolid plunger in said bore and adapted for reciprocation and rotationtherein and serving both as pumping element and dis-. tributing element,a fuel passageway from the portion of said bore in which fuel is pumpedunder pressure to the portion thereof in which fuel 5 is distributed anda check valve in the fuel path between said pumping and distributingportions. 16. In a fuel injection pump, a housing, a bore in saidhousing, a solid plunger in said bore and adapted for reciprocation androtation therein 5 and serving as pumping element and having means onits outer surface for serving as distrib- 1 uting element, a fuelpassageway from the portion of said bore in which fuel is pumped underpressure to the portion thereof in which fuelis g5 distributed and acheck valve in the fuel path between said pumping and distributingportions. 17. In a fuel injection pump, a housing, a single solidpumping and distributing member in said housing, a fuel passageway fordirecting fuel from 7 the pumping portion of said member to thedistributing portion thereof and a discharge check valve in the fuelpath between said pumping and distributing portions;

18. In a fuel injection pump. a housing, a bore II in said housing, afuel supply port communicating nected to said bore, fuel distributingmeansrinteber from the pumping to the distributing portions thereof anda discharge check valve positioned in the fuel path between said pumpingand distributing portions.

19. In a fuel injection pump, a housing. a single, solid pumping anddistributing member in said housing. a fuel passageway externally ofsaid bore for directing fuel from the pumping portion of said member tothe distributing portion thereof and a plurality of outlets adapted tocommunicate with said distributing portion.

20. In a fuel injection pump, a bore, means for supplying fuel to saidbore, spaced outlets adapted to direct fuel from said bore to aplurality of combustion chambers, a combined pumping and distributingelement in said bore, said element having a pumping portion and adistributing portion, means for directing f-uel pumped by said pumpingportion to said distributing portion, a

discharge check valve in said means for directing fuel, saiddistributing portion including distributing means adapted to registerwith each of said outlets successively and means for supplying fuel tosaid distributing means.

21. In a device of the character described, a housing, a bore in saidhousing, a plunger in said bore, said plunger having pumping anddistributing portions, a plurality of outlets communicating with saidbore, a fuel passageway ex-t ternally of said bore for directing fuelfrom the register with each of said outlets successively to direct fuelto said outlets in desired sequence and means communicating with saiddistributing means and adapted to register with said fuel passageway forsupplying fuel from said passageway to said distributing means.

28. In a device of the character described, a housing. a bore in saidhousing, a plunger in said bore, said plungerhaving pumping anddistributing portions, a plurality ofv outlets communicating with saidbore, a fuel passageway for directing fuel from the pumping portion ofsaid plunger to the distributing portion thereof, said distributingportion including distributing means adapted to register with each ofsaid outlets successively to direct fuel to said outlets in desiredsequence and means communicating with said distributing means andadapted to register with said fuel passageway for supplying fuel fromsaid passageway to said distributing means, and a dispumping portion ofsaid plunger to the distributing portion thereof, said distributingportion including distributing means adapted to register with each ofsaid outlets successively to direct fuel to said outlets in desiredsequence and means communicating with said-distributing means andadapted to register with said fuel passageway for supplying fuel-fromsaid passageway to said distributing means, and a discharge check valvein the fuel path between the pumping and distributpumping portion ofsaid plunger to the dis- 40 P r B d plun ertributing portion thereof,said distributing por-,,

tion including distributing means adapted to register with each of saidoutlets successively to direct fuel to said outlets in desired sequenceand means communicating with said distributing means and with said fuelpassageway and adapted to register with said fuel passageway forsupplying fuel from said passageway to said distributing means.

22. In a device of the character described, a housing, a bore in saidhousin a plunger in said bore, said plunger having pumping anddistributing portions, a plurality of outlets communicating with saidbore, a fuel passageway externally of said bore for directing fuelfromthe pumping portion of said plunger to the dis- .tributing portionthereof, said distributing portion including distributing means adaptedto mam J. BERLYN. JOHN J. naonnmcx.

REFERENCES crrEn The following references are of record in the file ofthis patent or original patent: I UNITED STATES PATENTS Number Pool Jan.a, 1946

